Development of UV dosimeter for UV flow device using fluorescent analysis and photocatalytic reaction.

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The chemical dosimeter that measures the UV irradiation dose promptly and handily for UV flow device was examined. The fluorescent measurement and the optical whitening agent were used to do under the high transparency condition similar as drinking water. The reaction promotion using the photocatalyst and the wavelength dependency of disinfection efficiency assuming to apply the polychromatic lamp were examined. It was observed that 0ptical whitening agent FBA-1 were neither the concentration nor the UV intensity dependency, and first order reaction material withno active moiety, and enhancement by photocatalyst wasn’t confirmed in high transparentcondition. In addition, the simulation of the UV dose distribution that assumed thediffusion light model and the laminar flow model in the flow device was implemented. And the results of simulation and the outcome of an experimental results of the bio dosimeter and FBA-1 dosimeter were within about 20 percent in error margin. Moreover, it was observed that the disinfection efficiency of short wavelength light was higher. However, it was thought to be able to apply this fluorescent-chemical dosimeter also to the polychromatic lamp because the influence of short wavelength was a little considering output spectrum of the lamp.